Ran out of water on Saturday - plumber finally arrived and replaced the control box - put brand new one in right out of the cardboard box. Water back. Sunday morning at 7:30 am(?!?!?) plumber rang doorbell with a control box in hand to "change" box he had put in. Me half asleep said Okay. Later, me not trusting - check "new" box. Doesn't look new (dented on top) but only difference I can see is old had capacitor and relay and this one just has capacitor. Received bill today for $75 w/o labor. Should I question equipment and is there a difference in control boxes?? Thank you.